genfb.c revision 1.24
1 /* $NetBSD: genfb.c,v 1.24 2009/02/20 00:08:00 jmcneill Exp $ */ 2 3 /*- 4 * Copyright (c) 2007 Michael Lorenz 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __KERNEL_RCSID(0, "$NetBSD: genfb.c,v 1.24 2009/02/20 00:08:00 jmcneill Exp $"); 31 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/kernel.h> 35 #include <sys/device.h> 36 #include <sys/proc.h> 37 #include <sys/mutex.h> 38 #include <sys/ioctl.h> 39 #include <sys/kernel.h> 40 #include <sys/systm.h> 41 #include <sys/kmem.h> 42 43 #include <dev/wscons/wsconsio.h> 44 #include <dev/wscons/wsdisplayvar.h> 45 #include <dev/rasops/rasops.h> 46 #include <dev/wsfont/wsfont.h> 47 48 #include <dev/wscons/wsdisplay_vconsvar.h> 49 50 #include <dev/wsfb/genfbvar.h> 51 52 #include "opt_genfb.h" 53 #include "opt_wsfb.h" 54 55 #ifdef GENFB_DEBUG 56 #define GPRINTF panic 57 #else 58 #define GPRINTF aprint_verbose 59 #endif 60 61 static int genfb_ioctl(void *, void *, u_long, void *, int, struct lwp *); 62 static paddr_t genfb_mmap(void *, void *, off_t, int); 63 static void genfb_init_screen(void *, struct vcons_screen *, int, long *); 64 65 static int genfb_putcmap(struct genfb_softc *, struct wsdisplay_cmap *); 66 static int genfb_getcmap(struct genfb_softc *, struct wsdisplay_cmap *); 67 static void genfb_restore_palette(struct genfb_softc *); 68 static int genfb_putpalreg(struct genfb_softc *, uint8_t, uint8_t, 69 uint8_t, uint8_t); 70 71 extern const u_char rasops_cmap[768]; 72 73 static int genfb_cnattach_called = 0; 74 static int genfb_enabled = 1; 75 76 struct wsdisplay_accessops genfb_accessops = { 77 genfb_ioctl, 78 genfb_mmap, 79 NULL, /* alloc_screen */ 80 NULL, /* free_screen */ 81 NULL, /* show_screen */ 82 NULL, /* load_font */ 83 NULL, /* pollc */ 84 NULL /* scroll */ 85 }; 86 87 static struct genfb_softc *genfb_softc = NULL; 88 89 void 90 genfb_init(struct genfb_softc *sc) 91 { 92 prop_dictionary_t dict; 93 uint64_t cmap_cb; 94 uint32_t fboffset; 95 96 dict = device_properties(&sc->sc_dev); 97 #ifdef GENFB_DEBUG 98 printf(prop_dictionary_externalize(dict)); 99 #endif 100 if (!prop_dictionary_get_uint32(dict, "width", &sc->sc_width)) { 101 GPRINTF("no width property\n"); 102 return; 103 } 104 if (!prop_dictionary_get_uint32(dict, "height", &sc->sc_height)) { 105 GPRINTF("no height property\n"); 106 return; 107 } 108 if (!prop_dictionary_get_uint32(dict, "depth", &sc->sc_depth)) { 109 GPRINTF("no depth property\n"); 110 return; 111 } 112 113 /* XXX should be a 64bit value */ 114 if (!prop_dictionary_get_uint32(dict, "address", &fboffset)) { 115 GPRINTF("no address property\n"); 116 return; 117 } 118 119 sc->sc_fboffset = fboffset; 120 121 if (!prop_dictionary_get_uint32(dict, "linebytes", &sc->sc_stride)) 122 sc->sc_stride = (sc->sc_width * sc->sc_depth) >> 3; 123 124 /* 125 * deal with a bug in the Raptor firmware which always sets 126 * stride = width even when depth != 8 127 */ 128 if (sc->sc_stride < sc->sc_width * (sc->sc_depth >> 3)) 129 sc->sc_stride = sc->sc_width * (sc->sc_depth >> 3); 130 131 sc->sc_fbsize = sc->sc_height * sc->sc_stride; 132 133 /* optional colour map callback */ 134 sc->sc_cmcb = NULL; 135 if (prop_dictionary_get_uint64(dict, "cmap_callback", &cmap_cb)) { 136 if (cmap_cb != 0) 137 sc->sc_cmcb = (void *)(vaddr_t)cmap_cb; 138 } 139 } 140 141 int 142 genfb_attach(struct genfb_softc *sc, struct genfb_ops *ops) 143 { 144 struct wsemuldisplaydev_attach_args aa; 145 prop_dictionary_t dict; 146 struct rasops_info *ri; 147 uint16_t crow; 148 long defattr; 149 int i, j; 150 bool console; 151 152 dict = device_properties(&sc->sc_dev); 153 prop_dictionary_get_bool(dict, "is_console", &console); 154 155 if (prop_dictionary_get_uint16(dict, "cursor-row", &crow) == false) 156 crow = 0; 157 if (prop_dictionary_get_bool(dict, "clear-screen", &sc->sc_want_clear) 158 == false) 159 sc->sc_want_clear = true; 160 161 /* do not attach when we're not console */ 162 if (!console) { 163 aprint_normal_dev(&sc->sc_dev, "no console, unable to continue\n"); 164 return -1; 165 } 166 167 aprint_verbose_dev(&sc->sc_dev, "framebuffer at %p, size %dx%d, depth %d, " 168 "stride %d\n", 169 sc->sc_fboffset ? (void *)sc->sc_fboffset : sc->sc_fbaddr, 170 sc->sc_width, sc->sc_height, sc->sc_depth, sc->sc_stride); 171 172 sc->sc_defaultscreen_descr = (struct wsscreen_descr){ 173 "default", 174 0, 0, 175 NULL, 176 8, 16, 177 WSSCREEN_WSCOLORS | WSSCREEN_HILIT, 178 NULL 179 }; 180 sc->sc_screens[0] = &sc->sc_defaultscreen_descr; 181 sc->sc_screenlist = (struct wsscreen_list){1, sc->sc_screens}; 182 memcpy(&sc->sc_ops, ops, sizeof(struct genfb_ops)); 183 sc->sc_mode = WSDISPLAYIO_MODE_EMUL; 184 185 sc->sc_shadowfb = kmem_alloc(sc->sc_fbsize, KM_SLEEP); 186 if (sc->sc_want_clear == false && sc->sc_shadowfb != NULL) 187 memcpy(sc->sc_shadowfb, sc->sc_fbaddr, sc->sc_fbsize); 188 189 vcons_init(&sc->vd, sc, &sc->sc_defaultscreen_descr, 190 &genfb_accessops); 191 sc->vd.init_screen = genfb_init_screen; 192 193 /* Do not print anything between this point and the screen 194 * clear operation below. Otherwise it will be lost. */ 195 196 ri = &sc->sc_console_screen.scr_ri; 197 198 vcons_init_screen(&sc->vd, &sc->sc_console_screen, 1, 199 &defattr); 200 sc->sc_console_screen.scr_flags |= VCONS_SCREEN_IS_STATIC; 201 202 sc->sc_defaultscreen_descr.textops = &ri->ri_ops; 203 sc->sc_defaultscreen_descr.capabilities = ri->ri_caps; 204 sc->sc_defaultscreen_descr.nrows = ri->ri_rows; 205 sc->sc_defaultscreen_descr.ncols = ri->ri_cols; 206 wsdisplay_cnattach(&sc->sc_defaultscreen_descr, ri, 0, crow, 207 defattr); 208 209 /* Clear the whole screen to bring it to a known state. */ 210 if (sc->sc_want_clear) 211 (*ri->ri_ops.eraserows)(ri, 0, ri->ri_rows, defattr); 212 213 j = 0; 214 for (i = 0; i < (1 << sc->sc_depth); i++) { 215 216 sc->sc_cmap_red[i] = rasops_cmap[j]; 217 sc->sc_cmap_green[i] = rasops_cmap[j + 1]; 218 sc->sc_cmap_blue[i] = rasops_cmap[j + 2]; 219 genfb_putpalreg(sc, i, rasops_cmap[j], rasops_cmap[j + 1], 220 rasops_cmap[j + 2]); 221 j += 3; 222 } 223 224 if (genfb_softc == NULL) 225 genfb_softc = sc; 226 227 aa.console = console; 228 aa.scrdata = &sc->sc_screenlist; 229 aa.accessops = &genfb_accessops; 230 aa.accesscookie = &sc->vd; 231 232 config_found(&sc->sc_dev, &aa, wsemuldisplaydevprint); 233 234 return 0; 235 } 236 237 static int 238 genfb_ioctl(void *v, void *vs, u_long cmd, void *data, int flag, 239 struct lwp *l) 240 { 241 struct vcons_data *vd = v; 242 struct genfb_softc *sc = vd->cookie; 243 struct wsdisplay_fbinfo *wdf; 244 struct vcons_screen *ms = vd->active; 245 int new_mode, error; 246 247 switch (cmd) { 248 case WSDISPLAYIO_GINFO: 249 if (ms == NULL) 250 return ENODEV; 251 wdf = (void *)data; 252 wdf->height = ms->scr_ri.ri_height; 253 wdf->width = ms->scr_ri.ri_width; 254 wdf->depth = ms->scr_ri.ri_depth; 255 wdf->cmsize = 256; 256 return 0; 257 258 case WSDISPLAYIO_GETCMAP: 259 return genfb_getcmap(sc, 260 (struct wsdisplay_cmap *)data); 261 262 case WSDISPLAYIO_PUTCMAP: 263 return genfb_putcmap(sc, 264 (struct wsdisplay_cmap *)data); 265 266 case WSDISPLAYIO_LINEBYTES: 267 *(u_int *)data = sc->sc_stride; 268 return 0; 269 270 case WSDISPLAYIO_SMODE: 271 new_mode = *(int *)data; 272 273 /* notify the bus backend */ 274 error = 0; 275 if (sc->sc_ops.genfb_ioctl) 276 error = sc->sc_ops.genfb_ioctl(sc, vs, 277 cmd, data, flag, l); 278 if (error) 279 return error; 280 281 if (new_mode != sc->sc_mode) { 282 sc->sc_mode = new_mode; 283 if (new_mode == WSDISPLAYIO_MODE_EMUL) { 284 genfb_restore_palette(sc); 285 vcons_redraw_screen(ms); 286 } 287 } 288 return 0; 289 default: 290 if (sc->sc_ops.genfb_ioctl) 291 return sc->sc_ops.genfb_ioctl(sc, vs, cmd, 292 data, flag, l); 293 } 294 return EPASSTHROUGH; 295 } 296 297 static paddr_t 298 genfb_mmap(void *v, void *vs, off_t offset, int prot) 299 { 300 struct vcons_data *vd = v; 301 struct genfb_softc *sc = vd->cookie; 302 303 if (sc->sc_ops.genfb_mmap) 304 return sc->sc_ops.genfb_mmap(sc, vs, offset, prot); 305 306 return -1; 307 } 308 309 static void 310 genfb_init_screen(void *cookie, struct vcons_screen *scr, 311 int existing, long *defattr) 312 { 313 struct genfb_softc *sc = cookie; 314 struct rasops_info *ri = &scr->scr_ri; 315 316 ri->ri_depth = sc->sc_depth; 317 ri->ri_width = sc->sc_width; 318 ri->ri_height = sc->sc_height; 319 ri->ri_stride = sc->sc_stride; 320 ri->ri_flg = RI_CENTER; 321 if (sc->sc_want_clear) 322 ri->ri_flg |= RI_FULLCLEAR; 323 324 if (sc->sc_shadowfb != NULL) { 325 326 ri->ri_hwbits = (char *)sc->sc_fbaddr; 327 ri->ri_bits = (char *)sc->sc_shadowfb; 328 } else 329 ri->ri_bits = (char *)sc->sc_fbaddr; 330 331 if (existing && sc->sc_want_clear) { 332 ri->ri_flg |= RI_CLEAR; 333 } 334 335 rasops_init(ri, sc->sc_height / 8, sc->sc_width / 8); 336 ri->ri_caps = WSSCREEN_WSCOLORS; 337 338 rasops_reconfig(ri, sc->sc_height / ri->ri_font->fontheight, 339 sc->sc_width / ri->ri_font->fontwidth); 340 341 ri->ri_hw = scr; 342 } 343 344 static int 345 genfb_putcmap(struct genfb_softc *sc, struct wsdisplay_cmap *cm) 346 { 347 u_char *r, *g, *b; 348 u_int index = cm->index; 349 u_int count = cm->count; 350 int i, error; 351 u_char rbuf[256], gbuf[256], bbuf[256]; 352 353 #ifdef GENFB_DEBUG 354 aprint_debug("putcmap: %d %d\n",index, count); 355 #endif 356 if (cm->index >= 256 || cm->count > 256 || 357 (cm->index + cm->count) > 256) 358 return EINVAL; 359 error = copyin(cm->red, &rbuf[index], count); 360 if (error) 361 return error; 362 error = copyin(cm->green, &gbuf[index], count); 363 if (error) 364 return error; 365 error = copyin(cm->blue, &bbuf[index], count); 366 if (error) 367 return error; 368 369 memcpy(&sc->sc_cmap_red[index], &rbuf[index], count); 370 memcpy(&sc->sc_cmap_green[index], &gbuf[index], count); 371 memcpy(&sc->sc_cmap_blue[index], &bbuf[index], count); 372 373 r = &sc->sc_cmap_red[index]; 374 g = &sc->sc_cmap_green[index]; 375 b = &sc->sc_cmap_blue[index]; 376 377 for (i = 0; i < count; i++) { 378 genfb_putpalreg(sc, index, *r, *g, *b); 379 index++; 380 r++, g++, b++; 381 } 382 return 0; 383 } 384 385 static int 386 genfb_getcmap(struct genfb_softc *sc, struct wsdisplay_cmap *cm) 387 { 388 u_int index = cm->index; 389 u_int count = cm->count; 390 int error; 391 392 if (index >= 255 || count > 256 || index + count > 256) 393 return EINVAL; 394 395 error = copyout(&sc->sc_cmap_red[index], cm->red, count); 396 if (error) 397 return error; 398 error = copyout(&sc->sc_cmap_green[index], cm->green, count); 399 if (error) 400 return error; 401 error = copyout(&sc->sc_cmap_blue[index], cm->blue, count); 402 if (error) 403 return error; 404 405 return 0; 406 } 407 408 static void 409 genfb_restore_palette(struct genfb_softc *sc) 410 { 411 int i; 412 413 for (i = 0; i < (1 << sc->sc_depth); i++) { 414 genfb_putpalreg(sc, i, sc->sc_cmap_red[i], 415 sc->sc_cmap_green[i], sc->sc_cmap_blue[i]); 416 } 417 } 418 419 static int 420 genfb_putpalreg(struct genfb_softc *sc, uint8_t idx, uint8_t r, uint8_t g, 421 uint8_t b) 422 { 423 424 if (sc->sc_cmcb) { 425 426 sc->sc_cmcb->gcc_set_mapreg(sc->sc_cmcb->gcc_cookie, 427 idx, r, g, b); 428 } 429 return 0; 430 } 431 432 void 433 genfb_cnattach(void) 434 { 435 genfb_cnattach_called = 1; 436 } 437 438 void 439 genfb_disable(void) 440 { 441 genfb_enabled = 0; 442 } 443 444 int 445 genfb_is_console(void) 446 { 447 return genfb_cnattach_called; 448 } 449 450 int 451 genfb_is_enabled(void) 452 { 453 return genfb_enabled; 454 } 455 456 int 457 genfb_borrow(bus_addr_t addr, bus_space_handle_t *hdlp) 458 { 459 struct genfb_softc *sc = genfb_softc; 460 461 if (sc && sc->sc_ops.genfb_borrow) 462 return sc->sc_ops.genfb_borrow(sc, addr, hdlp); 463 return 0; 464 } 465
Indexes created Thu Sep 25 16:09:42 GMT 2025